Molding-machine.



PATENTED SEPT- 19, 1905.

W. E. CLIFFORD.

MOLDING MACHINE.

APPLIoATloN FILED ocT. 24,1902.

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No. 799,776. PATENTED SEPT. 19, 1905. W. E. CLIFFORD.

MOLDING MACHINE.

APPLICATION FILED 00T. 24,1902.

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'TTOQNEY NITEI) STATES PATENT orrion.

WALTER E. CLIFFORD, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR, BY

MESNE ASSIGNMENTS, TO JOHN J. WEHINGER, OF VORCESTER, MAS- SACHUSETTS.

NIOLDING-NIACHINE.

Specification of Letters Patent.

Patented sept. 19, 1905.

Application filed October 24:, 1902. Serial No. 128,548.

To all whom, it may con/cern:

Be it known that I, WALTER E. CLIFFORD, a citizen of the United States, residing at Hopedale, in the county' of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Mold.

ing-Machines, of which the following is a specification accompanied by drawings forming a part of the same, in which Figure 1 is a view in perspective of my invention with the pattern-carrier at its highest elevation. Fig. 2 is a vertical longitudinal sectional View of my inventionV with the pattern-carrier depressed to its lowest position. Fig. 3 is a transverse sectional view of my invention, said View being taken between the cross-bar 6 and the intermediate bed-plate 4 looking toward the cross-bar 6, with the pattern-carrier at its lowest position, as shown in Fig. 2. Fig. 4L is an endview of a molding-machine embodying my invention with the pattern-carrier depressed to its lowest position.

Similar reference figures refer to similar parts in the different views.

The objects of my invention are to furnish protection from the sand for the operative parts of the mechanism by their coverings and their position; to so construct and operate the machine that it may be built low to the ground in order to facilitate handling and loading; to afford means for locking the pattern-carrier in its elevated position-that is, with the pattern projecting through the stripping-plate ready for the sand; to provide means for the synchronous movement of the four corners of the pattern-carrier.

I accomplish the above results by the following construction, but I donot restrict myself to it.

Referring to the accompanying drawings, the frame of the machine is constructed with sides 1 1, mounted on wheels 2 2 and connected together and braced by ends 3 3 and intermediate bed-plates 44. The sides 1 1 overhang at their upper edges 5 5, and the ends 3 3 extend upward at 10 10 to meet the overhanging portions 5 5, so that the upper portions 10 10 of the ends 3 3 and overhanging portions 5 5 form housings to aid in protecting Vfrom the sand the operative mechanism, most of which is located beneath such bars 7 7, on which the pattern-board 8 is placed, rigidly supported at each end by vertical arms 11 11 from cross-bars 6 6. (Shown in Figs. 2 and The vertical movement of said cross-bars 6 6 is determined by guiderods 12 12, which extend upward from said cross-bars 6 6 and slide in the inverted boxes 13 13, which depend from the overhanging portions 5 5 of the sides 1 1 of the frame. The entrance of sand into these boxes and the consequent obstruction and damage to the guide-rods 12 12 is prevented, it will be apparent, by their inverted position, and also by the protection afforded by the overhanging edges 5 5 of the sides 1 1 and the ends 10 10.

It is also obvious that when the pattern-car` rier is at its highest elevation the guide-rods 12 12 are wholly within the boxes, 13 13, and as at this time'the sand is deposited around the pattern the advantages of my construction,whereby the guide-rods 1212 areinclosed, are apparent. This inverted position of the boxes is also of Value in that it allows the pattern-carrier, and hence the stripping-plate and the entire machine, to be lower and nearer the ground, and is entirely novel as far as I am aware.

The cross-bars 6 6 are supported by shafts 15 15, journaled in said cross-bars and extending beyond them and beyond the ends 3 3 of the frame through vertical slots 16n 16 in the ends 3 3. Attached to the ends of said shafts 15 15 are cranks 17 17, and the pair of cranks at each end of the machine are connected by connecting-rods 19 19. Said cranks are also provided with crank-pins 22 22, which are journaled in curved hangers 2O 20, which hangers are pivotally connected with the upper portions 10 10 of the ends 3 3 at 21 21. As the cranks 17 17 and shafts 15 15 are connected by the rods 19 19 it is clear that when one of the shafts is rocked, as by the handlever 23, both shafts 15 15, and hence the pattern-carrier, will be lifted by the cranks 17 17, whose crank-pins revolved in the swinging links 2O 20,' the horizontal position of which pins is determined by the length of the hangers 20 20. These crank-pins 22 22, journaled in the swinging hangers or links 2O 20, have a horizontal oscillating motion as they turn in the swinging links and the shafts 15 15 rise and fall.

tion-that is, raising the shafts themselves, cranks having crank-pins Journaled in hori- IOO This method of construczontally-oscillating links instead of the pattern-carrier alone from the shaftsf-is novel, so far as I am aware, and allows a more compact and hence lower construction of the machine, which is highly desirable. The hangers 2O 20 are provided with curves or bends 26 26 to clear the shafts 15 15 and to allow said shafts to attain a position approximately vertical to the pins 22 when the pattern-carrier is raised, so that the pattern-carrier is effectually locked in its elevated position against a downward movement until the shafts 15 15 are rocked by the hand-lever 23.

rI`he operation of molding on my invention is performed in the usual and well-known manner, with the improvements before noted-that is, covering the operative parts by the construction of the frame above described as a protection fromthe sand, a more compact construction of the pattern-carrier and its operative parts by means of which the machine may be built lower to the ground, which is greatly aided by my method of raising the shafts by cranks provided with crankpins journaled in oscillating links having a limited horizontal movement, hanging' the shafts from elevated bearings above the sand, 85e., falling from the mold, which also provides for my new method of locking the pattern-carrier in its elevated position, and an improved construction of the pattern-carrier and the means for its manipulation.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a molding-machine, the combination with a pattern-carrier having avertical sliding connection with the frame of the machine and supported on shafts journaled in said patterncarrier vand having a vertical reciprocating motion, of cranks by which vertical reciprocating motion is imparted to said shafts, oscillating links connecting said cranks with the frame of the machine, and means for simultaneously rocking said cranks.

2. In a molding-machine, the combination with a pattern-carrier having upwardly-extending guide-rods carried by said patterncarrier, inverted boxes fastened to the frame of the machine in which said guide-rods slide, of cranks connected with said pattern-carrier by which a vertical reciprocating motion may be imparted to said carrier, oscillating links connecting said cranks with the frame of the machine, and means for simultaneously rocking said cranks.

3. In a molding-machine, the combination with a pattern-carrier,having a vertical sliding connection with the frame o f the machine, of cranksconnected with said pattern-carrier by which a vertical reciprocating motion may be imparted to said carrier, oscillating links connecting said cranks with the frame of the machine, and means for simultaneously rocking said cranks.

L1. In a molding-machine, the combination with a pattern-carrier having a vertical sliding connection with the frame of the machine, of cranks connected with said pattern-carrier by which a vertical reciprocating motion may be imparted to said carrier, oscillating links connecting said cranks with the frame of the machine, means for rocking one of said cranks and rods connecting said cranks.

5. In a molding-machine, the combination of hangers pivoted to the frame of the machine, cranks pivoted to said hangers, shafts supporting the pattern-carrier pivoted to said cranks and arranged to rise and fall in connectiongvith each other, and to carry with them the pattern-carrier, and means for rocking said shafts, substantially as described.

6. In a molding-machine, the combination of a pattern-carrier supported on shafts arranged to rise and fall in connection with each other and to carry the pattern-carrier with them, hangers pivoted to the frame of the machine and supporting said shafts, and means for securing said shafts in their highest position so that their descent must be begun by force external to the machine, substantially as described.

7. In a molding-machine, the combination of a pattern-carrier supported on shafts arranged to rise and fall in connection with each other and to carry the pattern-carrier with them, hangers pivoted to the frame of the machine, cranks pivoted to said hangers and attached to said shafts, bends in the hangers allowing the shafts to be locked therein at their highest position and means for rocking the shafts, substantially as described.

8. In a molding-machine, the combination of overhanging edges of the sides of the frame and upward extensions of the. ends to form housings for the operative mechanism, a pattern-carrier consisting of longitudinal supporting-bars, supported at each end by crossbars, and with upwardly-extending guiderods adapted to slide in inverted boxes fastened to the frame of the machine, shafts supporting said pattern-carrier and arranged to rise and fall in connection with each other and to carry said pattern-carrier with them, hangers pivoted to the frame of the machine and supporting said shafts, means for raising and lowering said shafts and means for locking said shafts in their highest position, substantially as described.

Dated this 27th day of June, 1902.

WALTER E. CLIFFORD.

Vitnesses:

VENDELL WILLIAMS, HENRY A. DANIELS.

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